241 	char *file, *backing_file, *serial;  in ubd_setup_common()  local
319 	backing_file = strsep(&str, ",:");  in ubd_setup_common()
320 	if (backing_file && *backing_file == '\0')  in ubd_setup_common()
321 		backing_file = NULL;  in ubd_setup_common()
327 	if (backing_file && ubd_dev->no_cow) {  in ubd_setup_common()
334 	ubd_dev->cow.file = backing_file;  in ubd_setup_common()
506 	char *backing_file;  in ubd_file_size()  local
522 	err = read_cow_header(file_reader, &fd, &version, &backing_file, \  in ubd_file_size()
529 		file = backing_file;  in ubd_file_size()
620 	char *backing_file;  in open_ubd_file()  local
651 	err = read_cow_header(file_reader, &fd, &version, &backing_file, &mtime,  in open_ubd_file()
661 	asked_switch = path_requires_switch(*backing_file_out, backing_file,  in open_ubd_file()
676 		*backing_file_out = backing_file;  in open_ubd_file()
691 static int create_cow_file(char *cow_file, char *backing_file,  in create_cow_file()  argument
707 	err = init_cow_file(fd, cow_file, backing_file, sectorsize, alignment,  in create_cow_file()